The solar dust ring

Abstract

A theoretical model is used to explain the dynamical behavior of dust particles (grains) near the Sun. The equation of motion includes gravitation, electromagnetic forces and radiation pressure as well as drags. All dust particles which are near the Sun lose mass by sublimation, and both radiation pressure and sublimation control the dust grain life time and modify the orbital parameters. In the model, a physical consideration is made for the solar magnetic field: it is assumed that the field has only a radial component. The set of equations which describes all forces is presented in detail. Some physical aspects of the dynamical behavior of the dust are discussed.